Chemical Engineering > GATE 2017 > Particle Size
Size analysis was carried out on a sample of gravel. The data for mass fraction (xi) and average particle diameter (Dpi) of the fraction is given in the table below:
The mass mean diameter of the sample, to the nearest integer, is
| xi | Dpi (mm) |
|---|---|
| 0.2 | 5 |
| 0.4 | 10 |
| 0.4 | 20 |
Correct : 13
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